LU101962A1 - Sensor structure with periodic band gap structure - Google Patents
Sensor structure with periodic band gap structure Download PDFInfo
- Publication number
- LU101962A1 LU101962A1 LU101962A LU101962A LU101962A1 LU 101962 A1 LU101962 A1 LU 101962A1 LU 101962 A LU101962 A LU 101962A LU 101962 A LU101962 A LU 101962A LU 101962 A1 LU101962 A1 LU 101962A1
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- Prior art keywords
- periodic
- band gap
- sensor
- sensor structure
- phononic crystal
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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
- G01D21/00—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
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- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Measurement Of Mechanical Vibrations Or Ultrasonic Waves (AREA)
- Investigating Or Analyzing Materials By The Use Of Ultrasonic Waves (AREA)
Abstract
The present invention discloses a sensor structure with a periodic band gap structure. The sensor structure comprises a plurality of one-dimensional phononic crystal sector structures arranged concentrically, and a plurality of piezoelectric sensors arranged at the inside of the one-dimensional phononic crystal sector structures in one-to-one correspondence relationship. An air anti-interference zone is provided between adjacent one-dimensional phononic crystal sector structures. The present invention has the advantages that the sensor structure is formed of an acoustic metamaterial having a periodic structure design and made into an optical band gap structure. A sensing signal is enhanced by the local resonance effect of the metamaterial on a special frequency band of signal, thereby improving the sensitivity of the sensor, and enabling the designed sensor structure to have special physical properties.
Description
LU101962 | Sensor Structure with Periodic Band Gap Structure | The present invention relates to the technical field of sensor structures, .
and particularly to a sensor structure with a periodic band gap structure. | The study of phononic crystals provides new ideas in the field of .
vibration control. Phononic crystal consists of two or more elastic materials .
and has a periodic composite structure with elastic wave band gap | characteristics. Elastic waves form an elastic wave band gap when they propagate in a phononic crystal. In the frequency range of the band gap, the | propagation of elastic waves is suppressed. In recent years, scholars from | various countries have made many useful explorations on the control of | band gap of the phononic crystals. The explorations vary from the initial | adjustment of the geometric structure (scatterer shape and lattice structure) È to achieve band gap control to the use of the rheological properties of smart | materials to achieve the control of band structure of the phononic crystals. | Accordingly, to overcome the technical problem that the propagation of | the elastic wave is suppressed, resulting in low sensitivity of signal acquired, | the present invention provides a sensor structure with a periodic band gap | structure that guarantees the effective propagation of elastic waves and .
improves the signal sensitivity. | To solve the above technical problems, the present invention discloses a | sensor structure with a periodic band gap structure. The sensor structure |comprises a plurality of one-dimensional phononic crystal sector structures | arranged concentrically, and a plurality of piezoelectric sensors arranged at | the inside of the one-dimensional phononic crystal sector structures in | one-to-one correspondence relationship, where an air anti-interference zone .
is provided between adjacent one-dimensional phononic crystal sector | structures. | In an embodiment of the present invention, the one-dimensional | phononic crystal sector structure has periodic circular holes and/or periodic | square holes. | In an embodiment of the present invention, the periodic circular holes | and/or periodic square holes are periodic structures arranged concentrically. | In an embodiment of the present invention, the piezoelectric sensors are | arranged into a circular array, and an interval is provided between adjacent | piezoelectric sensors. | In an embodiment of the present invention, the interval size between | adjacent piezoelectric sensors is determined by the number of | high-sensitivity frequency bands of the sensors. : .
In an embodiment of the present invention, the minimum interval | between adjacent piezoelectric sensors is greater than 1 mm. | In an embodiment of the present invention, the sensor structure | comprises six one-dimensional phononic crystal sector structures, and the Ë six one-dimensional phononic crystal sector structures have different local . resonance bands. | In an embodiment of the present invention, the one-dimensional | phononic crystal sector structure is formed of an acoustic metamaterial | which has a periodic structure design and is made into an optical band gap | structure. Ê
In an embodiment of the present invention, the sensor structure is | configured as a circular structure, and has an outer diameter ®R in the range | of 100 mm <@R <500 mm. | In an embodiment of the present invention, the sensor structure has a ; thickness h in the range of 1 mm<h<10 mm. .
Compared with the prior art, the technical solution of the present | invention has the following advantages: |
1. In the present invention, the sensor structure is formed of an acoustic | metamaterial having a periodic structure design and made into an optical .
band gap structure. A sensing signal detected is enhanced by the local | resonance effect of the material on a special frequency band of signal, | thereby achieving the improvement of the sensitivity of the sensor, and | enabling the designed sensor structure to have special physical properties. .
2. In the present invention, a plurality of piezoelectric sensors are | employed and arranged into an array sensor, which can effectively perform | vector analysis on the signal. .
3. In the present invention, the local resonance frequency range of an . unknown metamaterial design can also be measured by gradually changing | the external frequency. .
| To make the disclosure of the present invention more comprehensible, | the present invention will be further described in detail by way of specific | embodiments of the present invention in combination to the accompanying | drawings, in which | Fig. 1 is a schematic view of a sensor structure with a periodic band gap | structure according to the present invention; |
4 / 10 .
Fig. 2 is a top view of a sensor structure with a periodic band gap 0 structure according to the present invention; | Fig. 3 is a side view of a sensor structure with a periodic band gap ‘ structure according to the present invention; | Reference numerals: 11-one-dimensional phononic crystal sector | structure, 12-piezoelectric sensor, 13-air anti-interference zone, 14-through .
hole. | As shown in Fig. 1, an embodiment of the present invention provides a . sensor structure with a periodic band gap structure. The sensor structure | comprises a plurality of one-dimensional phononic crystal sector structures .
11 arranged concentrically, and a plurality of piezoelectric sensors 12 | correspondingly arranged at the inside of the one-dimensional phononic | crystal sector structures 11, where an air anti-interference zone 13 is | provided between any two adjacent one-dimensional phononic crystal sector ; structures 13. | The sensor structure with a periodic band gap structure in this | embodiment comprises a plurality of one-dimensional phononic crystal | sector structures 11 arranged concentrically, and a plurality of piezoelectric | sensors 12 correspondingly arranged at the inside of the one-dimensional | phononic crystal sector structures 11. This is conducive to determine the | direction of a signal source and improving the sensitivity. Specifically, the | piezoelectric sensor 12 is close to the center of the circle, which is | beneficial to the positioning of the signal. Since different local resonance . bands can be achieved by changing the internal parameters of the . one-dimensional phononic crystal sector structures 11, when the elastic .
wave is transmitted to the piezoelectric sensor 12 through the | one-dimensional phononic crystal sector structures 11, different frequencies | can be generated and the frequency signal can be enhanced in a larger range, | thereby effectively improving the sensitivity. This is conducive to the | subsequent signal processing and research. Moreover, an air | anti-interference zone 13 is provided between any two adjacent | one-dimensional phononic crystal sector structures 11. By providing the air _ anti-interference zone 13, when the elastic wave is transmitted in any | one-dimensional phononic crystal sector structure 11, the interference from | two adjacent one-dimensional phononic crystal sector structures 11 can be | avoided. | In this embodiment, six one-dimensional phononic crystal sector structures | 11 are taken as examples to illustrate the transmission mode of elastic waves. | As shown in Fig. 1, the six one-dimensional phononic crystal sector | structures 11 are labeled as Al, A2, A3, A4, AS, and A6,respectively. | Correspondingly, six piezoelectric sensors 12 are provided, which are | respectively labeled as C1, C2, C3, C4, C5, and C6. When the elastic wave | is intended to be transmitted to C1, C2, C3, C4, C5, or C6 in the . piezoelectric sensors 12, it needs to travel through the corresponding A1, A2, , A3, A4, A5, or A6 in the one-dimensional phononic crystal sector structures |
11. The six one-dimensional phononic crystal sector structures 11 have | different local resonance bands, and form a metamaterial collectively. The | local resonance effect of the metamaterial allows the elastic wave having a | frequency falling in the resonance band to be enhanced. Because of the | multi-band metamaterial design and the different local resonance . frequencies, frequency signals in a larger range can be enhanced to improve .
the sensitivity. Moreover, a weak elastic wave signal can also be detected |since the local resonance of the metamaterial can enhance this signal, which | is beneficial to subsequent signal processing and other research. | As shown in Fig. 2, the one-dimensional phononic crystal sector | structures 11 are all formed of an acoustic metamaterial having a periodic À structure design and made into an optical band gap structure, and the | acoustic metamaterial of each of the one-dimensional phononic crystal | sector structures 11 has a different scale parameter and shape. Therefore, by | changing the above parameters, different local resonance bands can be | achieved, and the frequency signals in a larger range can be enhanced, | thereby improving the sensitivity. Specifically, the one-dimensional | phononic crystal sector structure 11 is provided with a plurality of through .
holes 14 thereon, through which signals of different frequencies can be . collected, so that the sensing sensitivity is higher. The through holes 14 are . arranged according to a set period, which is conducive to collecting .
sensitive signals in different frequency bands and improving the sensitivity | of signal received. The arrangement of the through holes 14 according to a | set period means that the arrangement of the through holes is a periodic . structure arranged concentrically. The shape of the through hole 14 may be | any shape such as a circle, a square, or a triangle. Generally, a periodic circular hole and/or periodic square hole design is often used. . The plurality of piezoelectric sensors 12 are arranged into a circular ' array, which is beneficial to effective vector analysis of signals. Specifically, | C1, C2, C3, C4, C5, and C6 in the piezoelectric sensors 12 form a circle that | has the same center as the circle formed by Al, A2, A3, A4, A5, and A6 in | the six one-dimensional phononic crystal sector structures 11. There is an | interval between any adjacent piezoelectric sensors 12, which prevents the . interference of the piezoelectric sensors 12 with each other. The interval size |between adjacent piezoelectric sensors 12 is mainly determined by the | number of high-sensitivity bands of the sensor. When the design requires a | large number of frequency bands, the interval size will become smaller. The | interval size needs to satisfy that the minimum interval size between | adjacent piezoelectric sensors 12 is greater than 1 mm, that is, the minimum | interval is greater than 1 mm. | In this embodiment, the sensor structure has a circular shape, and has an | outer diameter OR in the range of 100mm <eR <500mm. As shown in Fig. 3, | the sensor structure has a thickness h in the range of 1mm <h <10mm. | Apparently, the above-described embodiments are merely examples Ë provided for clarity of description, and are not intended to limit the | implementations of the present invention. Other variations or changes can be | made by those skilled in the art based on the above description. The | embodiments are not exhaustive herein. Obvious variations or changes .
derived therefrom also fall within the protection scope of the present | invention. |
Claims (10)
1. À sensor structure with a periodic band gap structure, comprising a | plurality of one-dimensional phononic crystal sector structures arranged | concentrically, and a plurality of piezoelectric sensors arranged at the inside | of the one-dimensional phononic crystal sector structures in one-to-one | correspondence relationship, wherein an air anti-interference zone is | arranged between adjacent one-dimensional phononic crystal sector | structures. |
2. The sensor structure with a periodic band gap structure according to | claim 1, wherein the one-dimensional phononic crystal sector structure has | periodic circular holes and/or periodic square holes. |
3. The sensor structure with a periodic band gap structure according to | claim 2, wherein the periodic circular holes and/or periodic square holes are . periodic structures arranged concentrically. |
4. The sensor structure with a periodic band gap structure according to . claim 1, wherein the piezoelectric sensors are arranged into a circular array, | and an interval is provided between adjacent piezoelectric sensors. |
5. The sensor structure with a periodic band gap structure according to . claim 1, wherein the interval size between adjacent piezoelectric sensors is .
determined by the number of high-sensitivity frequency bands of the | Sensors. |
6. The sensor structure with a periodic band gap structure according to | claim 5, wherein the minimum interval between adjacent piezoelectric .
sensors is greater than 1 mm. |
7. The sensor structure with a periodic band gap structure according to . claim 1, wherein the sensor structure comprises six one-dimensional |. phononic crystal sector structures, and the six one-dimensional phononic |
9 / 10 LU101962 | crystal sector structures have different local resonance bands. |
8. The sensor structure with a periodic band gap structure according to | claim 1, wherein the one-dimensional phononic crystal sector structure is | formed of an acoustic metamaterial having a periodic structure and made | into an optical band gap structure. |
9. The sensor structure with a periodic band gap structure according to | claim 1, wherein the sensor structure is configured as a circular structure, | and has an outer diameter OR in the range of 100 mm <oR <500 mm. |
10. The sensor structure with a periodic band gap structure according to | claim 1, wherein the sensor structure has a thickness h in the range of 1 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910020207.8A CN109737992B (en) | 2019-01-09 | 2019-01-09 | Sensor structure with periodic band gap structure |
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| LU101962A1 true LU101962A1 (en) | 2020-08-05 |
| LU101962B1 LU101962B1 (en) | 2020-11-30 |
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| CN (1) | CN109737992B (en) |
| 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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| AT370523B (en) * | 1981-06-24 | 1983-04-11 | List Hans | PIEZOELECTRIC TRANSMITTER |
| WO2006119200A2 (en) * | 2005-04-29 | 2006-11-09 | The Board Of Trustees Of The Leland Stanford Junior University | High-sensitivity fiber-compatible optical acoustic sensor |
| CN102986249B (en) * | 2010-07-23 | 2015-08-12 | 日本电气株式会社 | Oscillator and electronic equipment |
| 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 |
| CN102620808B (en) * | 2012-03-23 | 2014-03-26 | 哈尔滨工程大学 | Local resonance type phononic crystal filtering optical fiber hydrophone |
| CN102824190B (en) * | 2012-09-24 | 2015-02-04 | 深圳大学 | Two-dimensional annular phased array ultrasonic transducer structure |
| CN102928844B (en) * | 2012-11-08 | 2015-01-21 | 中北大学 | Underwater sub-wavelength resolution ratio three-dimensional imaging method |
| US9437184B1 (en) * | 2015-06-01 | 2016-09-06 | Baker Hughes Incorporated | Elemental artificial cell for acoustic lens |
| EP3408037A4 (en) * | 2016-01-27 | 2019-10-23 | 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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| Publication number | Publication date |
|---|---|
| CN109737992A (en) | 2019-05-10 |
| LU101962B1 (en) | 2020-11-30 |
| CN109737992B (en) | 2020-11-06 |
| WO2020143687A1 (en) | 2020-07-16 |
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